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LibRegex: Merge alternations based on blocks and not instructions

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The instructions can have dependencies (e.g. Repeat), so only unify
equal blocks instead of consecutive instructions.
Fixes #11247.

Also adds the minimal test case(s) from that issue.
This commit is contained in:
Ali Mohammad Pur 2021-12-15 08:52:07 +03:30 • committed by Ali Mohammad Pur
parent 92233660b8
commit d2e51fafa9
3 changed files with 23 additions and 17 deletions
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5
Userland/Libraries/LibRegex/RegexMatcher.h
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@ -227,10 +227,11 @@ public:
return result.success;
}
using BasicBlockList = Vector<Detail::Block>;
static BasicBlockList split_basic_blocks(ByteCode const&);
private:
void run_optimization_passes();
using BasicBlockList = Vector<Detail::Block>;
BasicBlockList split_basic_blocks();
void attempt_rewrite_loops_as_atomic_groups(BasicBlockList const&);
};